Modifiche

Usually the tip of the nib is made melting directly on place a ball of iridium (or equivalent material), and then it is cut in two dividing the tip in the two ''[[tines]]'' for the realization of the ''[[slit]]'' through which the ink coming from the feeder must pass, and then suitably polished to offer a better smoothness. In general then, both to allow the air to escape from the conductor and to reinforce the end of the ''[[slit]]'', the nib is equipped with the so-called "air hole", even if in many cases the only purpose for it is to give a better mechanical strength and flexibility. Some nibs also, such as the [[Triumph Nib]] of the [[Sheaffer]], or the central nib of the [[Omas 361]], are specially designed and machined to write from both sides, including therefore also the so-called [[dry side]].

Usually the tip of the nib is made melting directly on place a ball of iridium (or equivalent material), and then it is cut in two dividing the tip in the two ''[[tines]]'' for the realization of the ''[[slit]]'' through which the ink coming from the feeder must pass, and then suitably polished to offer a better smoothness. In general then, both to allow the air to escape from the conductor and to reinforce the end of the ''[[slit]]'', the nib is equipped with the so-called "air hole", even if in many cases the only purpose for it is to give a better mechanical strength and flexibility. Some nibs also, such as the [[Triumph Nib]] of the [[Sheaffer]], or the central nib of the [[Omas 361]], are specially designed and machined to write from both sides, including therefore also the so-called [[dry side]].

I pennini vengono classificati classicamente<ref>per classicamente si intende facendo riferimento al periodo iniziale della diffusione della penna stilografica, questo tipo di classificazione oggi è praticamente scomparso.</ref> in base ad una serie di numeri che ne esprimono le dimensioni, benché più o meno tutti i produttori abbiano adottato cifre simili (con valori che vanno dallo 00 al 12) i numeri non hanno un riferimento ad una precisa misura, ma sono semplicemente una indicazione relativa (un pennino #4 è in genere più grande di un #2 dello stesso produttore), e diversa fra un produttore e l'altro. Molto spesso (vedi ad esempio i [[Numerazione Waterman|numeri di Waterman]] e [[Numerazione Montblanc|quelli di Montblanc]]) questi numeri venivano utilizzati anche per identificare i diversi modelli di una linea di produzione.

The nibs are classified classically<ref>by classically it is meant referring to the initial period of the spread of the fountain pen, this type of classification has now virtually disappeared.</ref> based on a series of numbers expressing their size, although more or less all manufacturers have adopted similar figures (with values ranging from 00 to 12) the numbers do not have a reference to a precise measure, but are simply a relative indication (a nib #4 is usually larger than a #2 of the same manufacturer), and are different between a manufacturer and another. Very often, see for example the [[Numerazione Waterman|Waterman numbers]] and the [[Numerazione Montblanc|Montblanc numbers]], they were also used to identify the different models of a production line.

{{:Tabella misure pennini}}

{{:Tabella misure pennini}}